MNDWI和NDWI指数提取富营养化湖泊水体边界的对比研究.pdf

Advances in Geosciences 地球科学前沿, 2017, 7(6), 732-738 Published Online December 2017 in Hans. /journal/ag /10.12677/ag.2017.76074 Comparative Study on the Water Index of MNDWI and NDWI for Water Boundary Extraction in Eutrophic Lakes Quan Wang, Dejiang Liu, Hailan Yang, Juan Yin, Zhao Bin, Shuangli Zhu, Yumeng Zhang Yuxi Normal University, Yuxi Yunnan th th th Received: Nov. 10 , 2017; accepted: Nov. 24 , 2017; published: Nov. 29 , 2017 Abstract This study is based on the Landsat 8 OLI satellite images, and uses 5 lakes as sample, which are Dianchi Lake, Fuxian Lake, Yangzonghai Lake, Xingyun Lake and Qilu Lake, there are all located in the central region of Yunnan province, and Dianchi Lake, Xingyun Lake, Qilu Lake are eutrophic lakes. The accuracy of NDWI and MNDWI index for lake water boundary extraction was compared. The results show that the near infrared band can distinguish vegetation and water body better. But it has also brought the algae covered waters that can be mistakenly identified as vegetation. Therefore, the water area of eutrophic lake extracted by NDWI is smaller than the actual value. The infrared band is more sensitive to moisture content. Using this index in eutrophic lakes can effectively distinguish between land and water, eliminate algal interference. Therefore, the MNDWI index is more suitable for water boundary extraction in eutrophic lakes. Keywords Eutrophic Lakes, NDWI, MNDWI, Landsat 8 OLI MNDWI和NDWI指数提取富营养化湖泊水体 边界的对比研究 王 泉，柳德江，杨海兰，尹 娟，赵 斌，朱双丽，张雨萌 玉溪师范学院，云南 玉溪 收稿日期：2017年11月10 日；录用日期：2017年11月24 日；发布日期：2017年11月29 日 文章引用: 王泉, 柳德江, 杨海兰, 尹娟, 赵斌, 朱双丽, 张雨萌. MNDWI 和NDWI 指数提取富营养化湖泊水体边界的